package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.*;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;


import java.util.List;
import java.util.UUID;

@Service
@Slf4j
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
         password = DigestUtils.md5DigestAsHex((password + employee.getSalt()).getBytes());
        // 后期需要进行md5加密，然后再进行比对
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void save(EmployeeDTO employeeDTO) {

        Employee employee = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);

        employee.setStatus(StatusConstant.ENABLE);

        //采用md5密码保护的格式对密码进行保护，默认值为123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        employeeMapper.insert(employee);

    }

    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //使用分页插件，进行分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());


        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);

        long total = page.getTotal(); //总记录数

        List<Employee> records = page.getResult();  //当前页数据集合

        return  new  PageResult(total,records);

    }

    @Override
    public void startOrStop(Integer status, long id) {
        Employee employee = Employee.builder().status(status).id(id).build();
        employeeMapper.update(employee);

    }

    @Override
    public Employee getById(Long id) {
        Employee employee=employeeMapper.getById(id);
        employee.setPassword("****");//回显的时候密码不能显示出来
        return  employee;
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);//将两个字段相同的对象进行属性值的复制

        /*employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        employeeMapper.update(employee);
    }

    @Override
    public void editPassword(PasswordEditDTO passwordEditDTO) {
        //获取当前用户id
        Long empId = BaseContext.getCurrentId();
        if(empId==null){
            throw new UserNotLoginException(MessageConstant.USER_NOT_LOGIN);
        }
        Employee employee=employeeMapper.getById(empId);
        if (employee==null){
            throw new PasswordEditFailedException(MessageConstant.PASSWORD_EDIT_FAILED);
        }
        String newPassword = passwordEditDTO.getNewPassword();
        //加盐值
        String salt = UUID.randomUUID().toString().replace("-", "");
        employee.setSalt(salt);
        String password = DigestUtils.md5DigestAsHex((newPassword + salt).getBytes());
        employee.setPassword(password);

        employeeMapper.update(employee);
    }

}
